Anyone tried "Georello"?

[LunarSea]

I'm looking for something for ds for Christmas - and I think that this (Georello Gears by Quercetti) would appeal? Anyone tried this?

how old is ds? Someone bought dd the one at the bottom of your link. She really likes it (she's 5). I imagine the one at the top is the best for older children.

actually, should have said, she enjoys making chains with the gears but doesn't yet comprehend the science behind it (if you see what I mean). She plays with it and they love trying to making chains where all the cogs go round - so I imagine an older child would really love it (actually, I quite like messing about with it when they get it out!).

He's 4 - but very mechanically minded, and into fathoming out how things work. Although it says 5+ I don't think the top one would defeat him once he'd been shown it once or twice.